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 A250927 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element 9
 58, 344, 344, 2007, 4148, 2007, 11693, 50722, 50722, 11693, 68160, 628146, 1320397, 628146, 68160, 397432, 7811640, 34521887, 34521887, 7811640, 397432, 2317569, 97205912, 899626256, 1887760064, 899626256, 97205912, 2317569, 13514765 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .......58.........344...........2007.............11693................68160 ......344........4148..........50722............628146..............7811640 .....2007.......50722........1320397..........34521887............899626256 ....11693......628146.......34521887........1887760064.........102912852059 ....68160.....7811640......899626256......102912852059.......11784958341212 ...397432....97205912....23390844328.....5613563039740.....1352300043218971 ..2317569..1209466635...607786907671...306543548743117...155249795843668280 .13514765.15047023115.15792648591051.16748448512897363.17818166218188667617 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 FORMULA Empirical for column k: k=1: a(n) = 9*a(n-1) -23*a(n-2) +29*a(n-3) -16*a(n-4) +4*a(n-5) k=2: [order 13] k=3: [order 31] k=4: [order 81] EXAMPLE Some solutions for n=2 k=4 ..0..1..0..1..1....0..2..2..2..1....0..2..0..1..2....1..0..2..0..2 ..0..1..0..0..0....0..0..0..0..0....0..2..0..0..2....0..0..1..0..2 ..0..2..2..2..0....0..1..1..1..2....0..1..1..0..1....0..0..0..0..1 CROSSREFS Sequence in context: A051972 A027987 A141779 * A250920 A235673 A235730 Adjacent sequences: A250924 A250925 A250926 * A250928 A250929 A250930 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Nov 28 2014 STATUS approved

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Last modified September 14 10:49 EDT 2024. Contains 375921 sequences. (Running on oeis4.)